Dynamic memory allocation - how is it supported?

[gfvalvo]

@backflip

byte* ptr = &ADCSRA;

ADCSRA is hardware register in the ADC of the 328P chip. Can this kind of register be considered as memory mapped in the same way as RAM or Flash code memory?

The processor's datasheet will provide the memory map details.

BTW, the above is incorrect. It should be:

volatile byte* ptr = &ADCSRA;